2016-12-10T01:13:03ZReuse of textile dyeing effluents treated with coupled nanofiltration and electrochemical processeshttp://hdl.handle.net/2117/90621
Reuse of textile dyeing effluents treated with coupled nanofiltration and electrochemical processes
Buscio Olivera, Valentina; García Jiménez, María; Vilaseca Vallvé, M. Mercedes; López Grimau, Víctor; Crespi Rosell, Martin; Gutiérrez Bouzán, María Carmen
The reactive dye Cibacron Yellow S-3R was selected to evaluate the feasibility of combining nanofiltration membranes with electrochemical processes to treat textile wastewater. Synthetic dyeing effluents were treated by means of two nanofiltration membranes, Hydracore10 and Hydracore50. Up to 98% of dye removal was achieved. The influence of salt concentration and pH on membrane treatment was studied. The best dye removal yield was achieved at pH 3 in the presence of 60 g/L of NaCl. After the membrane filtration, the concentrate containing high dye concentration was treated by means of an electrochemical process at three different current densities: 33, 83, and 166 mA/cm2. Results showed a lineal relationship between treatment time and applied current density. Both permeates and electrochemically-decoloured effluents were reused in new dyeing processes (100% of permeate and 70% of decoloured concentrates). Dyed fabrics were evaluated with respect to original dyeing. Colour differences were found to be into the acceptance range
2016-10-10T10:04:47ZBuscio Olivera, ValentinaGarcía Jiménez, MaríaVilaseca Vallvé, M. MercedesLópez Grimau, VíctorCrespi Rosell, MartinGutiérrez Bouzán, María CarmenThe reactive dye Cibacron Yellow S-3R was selected to evaluate the feasibility of combining nanofiltration membranes with electrochemical processes to treat textile wastewater. Synthetic dyeing effluents were treated by means of two nanofiltration membranes, Hydracore10 and Hydracore50. Up to 98% of dye removal was achieved. The influence of salt concentration and pH on membrane treatment was studied. The best dye removal yield was achieved at pH 3 in the presence of 60 g/L of NaCl. After the membrane filtration, the concentrate containing high dye concentration was treated by means of an electrochemical process at three different current densities: 33, 83, and 166 mA/cm2. Results showed a lineal relationship between treatment time and applied current density. Both permeates and electrochemically-decoloured effluents were reused in new dyeing processes (100% of permeate and 70% of decoloured concentrates). Dyed fabrics were evaluated with respect to original dyeing. Colour differences were found to be into the acceptance rangeGestión de los efluentes de la industria textilhttp://hdl.handle.net/2117/87574
Gestión de los efluentes de la industria textil
López Grimau, Víctor; Crespi Rosell, Martin
Este Cuaderno Tecnológico trata de recopilar la información presentada durante la misión en Argentina de los expertos Dr. Martín Crespi Rosell y Dr. Víctor López Grimau dentro del
Proyecto ”Mejora de las Economías Regionales y Desarrollo Local en la República Argentina” financiado por la Unión Europea, como complemento al informe final realizado donde se recoge
toda la información recabada durante dicha misión.
Este cuaderno está preparado como manual de referencia tanto para técnicos del INTI como para técnicos de PyMES del sector textil. En primer lugar se describen los principales
parámetros que caracterizan las aguas residuales generadas en los procesos de preparación,
tintura y acabado de la industria textil. A continuación se hace un repaso de los diferentes
aspectos a tener en cuenta para llevar a cabo una gestión sostenible del agua en la industria
textil. Así, la gestión sostenible del agua incluye tanto la implantación de medidas encaminadas
a la prevención de la contaminación de los efluentes (ahorro de agua, sustitución de productos y
procesos) como la implantación de sistemas de tratamiento de las aguas residuales textiles con
el objetivo de reducir su contaminación y cumplir con la legislación ambiental vigente.
En el cuaderno se describen los principales procesos de depuración de aguas llevados a
cabo en la industria textil para finalmente dedicar un capítulo específico a los bioreactores de
membrana (BRM) ya que estos sistemas suponen una evolución tecnológica sobre los sistemas
convencionales de depuración de aguas y permiten obtener un agua tratada que por su calidad
es susceptible de ser reutilizada como agua de proceso en la industria textil.
2016-05-31T15:54:38ZLópez Grimau, VíctorCrespi Rosell, MartinEste Cuaderno Tecnológico trata de recopilar la información presentada durante la misión en Argentina de los expertos Dr. Martín Crespi Rosell y Dr. Víctor López Grimau dentro del
Proyecto ”Mejora de las Economías Regionales y Desarrollo Local en la República Argentina” financiado por la Unión Europea, como complemento al informe final realizado donde se recoge
toda la información recabada durante dicha misión.
Este cuaderno está preparado como manual de referencia tanto para técnicos del INTI como para técnicos de PyMES del sector textil. En primer lugar se describen los principales
parámetros que caracterizan las aguas residuales generadas en los procesos de preparación,
tintura y acabado de la industria textil. A continuación se hace un repaso de los diferentes
aspectos a tener en cuenta para llevar a cabo una gestión sostenible del agua en la industria
textil. Así, la gestión sostenible del agua incluye tanto la implantación de medidas encaminadas
a la prevención de la contaminación de los efluentes (ahorro de agua, sustitución de productos y
procesos) como la implantación de sistemas de tratamiento de las aguas residuales textiles con
el objetivo de reducir su contaminación y cumplir con la legislación ambiental vigente.
En el cuaderno se describen los principales procesos de depuración de aguas llevados a
cabo en la industria textil para finalmente dedicar un capítulo específico a los bioreactores de
membrana (BRM) ya que estos sistemas suponen una evolución tecnológica sobre los sistemas
convencionales de depuración de aguas y permiten obtener un agua tratada que por su calidad
es susceptible de ser reutilizada como agua de proceso en la industria textil.Photoassisted electrochemical treatment of azo and phtalocyanine reactive dyes in the presence of surfactantshttp://hdl.handle.net/2117/84798
Photoassisted electrochemical treatment of azo and phtalocyanine reactive dyes in the presence of surfactants
Sala, Mireia; López Grimau, Víctor; Gutiérrez Bouzán, María Carmen
An electrochemical treatment (EC) was applied at different intensities to degrade the chromophoric groups of dyes C.I. Reactive Black 5 (RB5) and C.I. Reactive Blue 7 (Rb7) until uncolored species were obtained. Decolorization rate constants of the azo dye RB5 were higher than the phtalocyanine Rb7 ones. In addition, the EC treatment was more efficient at higher intensities, but these conditions significantly increased the generation of undesirable by-products such as chloroform. The combination of EC with UV irradiation (UVEC) drastically minimized the generation of chloroform. The photo-assisted electrochemical treatment was also able to achieve decolorization values of 99%. Finally, mixtures of dyes and surfactants were treated by EC and UVEC. In the presence of surfactants, the decolorization kinetic of dyes was slowed due to the competitive reactions of surfactants degradation. Both methods achieved total decolorization and in both cases, the generation of haloforms was negligible.
2016-03-29T13:46:21ZSala, MireiaLópez Grimau, VíctorGutiérrez Bouzán, María CarmenAn electrochemical treatment (EC) was applied at different intensities to degrade the chromophoric groups of dyes C.I. Reactive Black 5 (RB5) and C.I. Reactive Blue 7 (Rb7) until uncolored species were obtained. Decolorization rate constants of the azo dye RB5 were higher than the phtalocyanine Rb7 ones. In addition, the EC treatment was more efficient at higher intensities, but these conditions significantly increased the generation of undesirable by-products such as chloroform. The combination of EC with UV irradiation (UVEC) drastically minimized the generation of chloroform. The photo-assisted electrochemical treatment was also able to achieve decolorization values of 99%. Finally, mixtures of dyes and surfactants were treated by EC and UVEC. In the presence of surfactants, the decolorization kinetic of dyes was slowed due to the competitive reactions of surfactants degradation. Both methods achieved total decolorization and in both cases, the generation of haloforms was negligible.Application of PVDF ultrafiltration membranes to treat and reuse textile wastewaterhttp://hdl.handle.net/2117/83064
Application of PVDF ultrafiltration membranes to treat and reuse textile wastewater
Buscio Olivera, Valentina; Crespi Rosell, Martin; Gutiérrez Bouzán, María Carmen
In this work, the feasibility of polyvinylidene difluoride ultrafiltration membranes to treat textile wastewater was studied. The C.I. Disperse Orange 30 and C.I. Disperse Rubine 73 were selected as pollutant for the membrane filtration study. The results showed about 90 and 96% of COD decrease and dye removal, respectively. In addition, very low fouling was observed which demonstrated the feasibility of applying this type of membranes to treat textile wastewater. Finally, after the membrane treatment, 100% of the obtained permeate was reused. Fabrics dyed with the reused water were evaluated with respect to references carried out with softened tap water. No significant colour differences were observed between reference fabrics and the fabrics dyed with the permeate
2016-02-17T10:39:16ZBuscio Olivera, ValentinaCrespi Rosell, MartinGutiérrez Bouzán, María CarmenIn this work, the feasibility of polyvinylidene difluoride ultrafiltration membranes to treat textile wastewater was studied. The C.I. Disperse Orange 30 and C.I. Disperse Rubine 73 were selected as pollutant for the membrane filtration study. The results showed about 90 and 96% of COD decrease and dye removal, respectively. In addition, very low fouling was observed which demonstrated the feasibility of applying this type of membranes to treat textile wastewater. Finally, after the membrane treatment, 100% of the obtained permeate was reused. Fabrics dyed with the reused water were evaluated with respect to references carried out with softened tap water. No significant colour differences were observed between reference fabrics and the fabrics dyed with the permeateStudy of the presence of geosmin in bottled mineral water by CLSA and GC-MShttp://hdl.handle.net/2117/82708
Study of the presence of geosmin in bottled mineral water by CLSA and GC-MS
Guadayol Gállego, Marta; Cortina Masana, Montserrat; Guadayol Cunill, José María; Caixach Gamisans, Josep
Organoleptic properties of water are the only means whereby a consumer can assess water quality and safety. Among these properties, taste and smell are the most important. Geosmin is a compound whose presence has been causing a large number of episodes about taste and smell in drinking water. Its smell has been described as “earthy-musty”. In this study several samples of bottled mineral water having an “earthy-musty” off-flavor have been analysed and concentrations of geosmin above its perception threshold have been detected. Closed Loop Stripping Analysis (CLSA) has been used as extraction and concentration method. Detection and quantitation of geosmin have been carried out by gas chromatographymass spectrometry (GC-MS). Many studies have reported the presence of geosmin in water and drinking water, but to our knowledge, this study is the first one where geosmin has been detected in bottled mineral water; El consumidor evalúa la calidad del agua a través de sus propiedades organolépticas, de entre las cuales el gusto y el olor son las más importantes. La geosmina es uno de los compuestos que ha generado más episodios de gusto y olor en el agua de bebida aportando un olor descrito como “tierra mojada”. En este estudio se han analizado muestras de agua embotellada que presentaban el citado mal olor y se ha detectado la presencia de geosmina en concentraciones por encima de su umbral de percepción. La extracción y concentración de la geosmina se realizó mediante CLSA (closed loop stripping analysis) mientras que su detección y cuantificación se llevaron a cabo mediante cromatografía de gases acoplada a espectrometría de masas (GC-MS). Se han descrito numerosos casos donde se ha detectado la presencia de la geosmina, incluso en agua potable, pero según la bibliografía consultada, este es el primer estudio en que se detecta en agua mineral embotellada
2016-02-09T12:31:29ZGuadayol Gállego, MartaCortina Masana, MontserratGuadayol Cunill, José MaríaCaixach Gamisans, JosepOrganoleptic properties of water are the only means whereby a consumer can assess water quality and safety. Among these properties, taste and smell are the most important. Geosmin is a compound whose presence has been causing a large number of episodes about taste and smell in drinking water. Its smell has been described as “earthy-musty”. In this study several samples of bottled mineral water having an “earthy-musty” off-flavor have been analysed and concentrations of geosmin above its perception threshold have been detected. Closed Loop Stripping Analysis (CLSA) has been used as extraction and concentration method. Detection and quantitation of geosmin have been carried out by gas chromatographymass spectrometry (GC-MS). Many studies have reported the presence of geosmin in water and drinking water, but to our knowledge, this study is the first one where geosmin has been detected in bottled mineral water
El consumidor evalúa la calidad del agua a través de sus propiedades organolépticas, de entre las cuales el gusto y el olor son las más importantes. La geosmina es uno de los compuestos que ha generado más episodios de gusto y olor en el agua de bebida aportando un olor descrito como “tierra mojada”. En este estudio se han analizado muestras de agua embotellada que presentaban el citado mal olor y se ha detectado la presencia de geosmina en concentraciones por encima de su umbral de percepción. La extracción y concentración de la geosmina se realizó mediante CLSA (closed loop stripping analysis) mientras que su detección y cuantificación se llevaron a cabo mediante cromatografía de gases acoplada a espectrometría de masas (GC-MS). Se han descrito numerosos casos donde se ha detectado la presencia de la geosmina, incluso en agua potable, pero según la bibliografía consultada, este es el primer estudio en que se detecta en agua mineral embotelladaLight wavelength-dependent E. coli survival changes after simulated solar disinfection of secondary effluenthttp://hdl.handle.net/2117/81291
Light wavelength-dependent E. coli survival changes after simulated solar disinfection of secondary effluent
Giannakis, Stefanos; Ritmi, Sami; Darakas, Efthymios; Escalas Cañellas, Antoni; Pulgarin, César
In this study, the photoreactivation and the modification of dark repair of E. coli in a simulated secondary effluent were investigated after initial irradiation in different conditions. The simulated solar exposure of the secondary wastewater was followed by exposure to six different low-intensity fluorescent lamps (blacklight blue, actinic blacklight, blue, green, yellow and indoor light) up to 8 h. When phoreactivation was monitored, blue and green color fluorescent light led to an increased bacterial regrowth. Blacklight lamps further inactivated the remaining bacteria, while yellow and indoor light led to an accelerated growth of healthy cells. Exposure to fluorescent lamps was followed by long term dark storage, to monitor the bacterial repair in the dark. The response was correlated with the pre-exposure dose of applied solar irradiation and at a lesser extent with the fluorescent light dose. Bacteria which have undergone extensive exposure had no response neither under fluorescent light nor during dark storage. Finally, the statistical treatment of the data allowed to suggest a linear model, non-selective in terms of the fluorescent light applied. The estimation of the final bacterial population was well predicted (R-sq~75%) and the photoreactivation risk was found more important cultivable cells
2016-01-12T14:52:25ZGiannakis, StefanosRitmi, SamiDarakas, EfthymiosEscalas Cañellas, AntoniPulgarin, CésarIn this study, the photoreactivation and the modification of dark repair of E. coli in a simulated secondary effluent were investigated after initial irradiation in different conditions. The simulated solar exposure of the secondary wastewater was followed by exposure to six different low-intensity fluorescent lamps (blacklight blue, actinic blacklight, blue, green, yellow and indoor light) up to 8 h. When phoreactivation was monitored, blue and green color fluorescent light led to an increased bacterial regrowth. Blacklight lamps further inactivated the remaining bacteria, while yellow and indoor light led to an accelerated growth of healthy cells. Exposure to fluorescent lamps was followed by long term dark storage, to monitor the bacterial repair in the dark. The response was correlated with the pre-exposure dose of applied solar irradiation and at a lesser extent with the fluorescent light dose. Bacteria which have undergone extensive exposure had no response neither under fluorescent light nor during dark storage. Finally, the statistical treatment of the data allowed to suggest a linear model, non-selective in terms of the fluorescent light applied. The estimation of the final bacterial population was well predicted (R-sq~75%) and the photoreactivation risk was found more important cultivable cellsKinetic study of the indirect electro-oxidation of azo reactive dyeshttp://hdl.handle.net/2117/77663
Kinetic study of the indirect electro-oxidation of azo reactive dyes
López Grimau, Víctor; Pepió Viñals, Montserrat; Gutiérrez Bouzán, María Carmen
In this work, an electrochemical treatment in a batch cell with Ti/Pt anode was applied to degrade two
reactive dyes (Color Index Reactive Orange 4 and 13) in the presence of chloride ions, usually used as
dyeing electrolyte. For the two dyes, the kinetic of degradation was studied and also kinetic constants
were modelled. The influence of several factors such as pH, conductivity, dye concentration and reactive
group structure were evaluated. The adjustment of the established models was also studied.
2015-10-14T08:17:23ZLópez Grimau, VíctorPepió Viñals, MontserratGutiérrez Bouzán, María CarmenIn this work, an electrochemical treatment in a batch cell with Ti/Pt anode was applied to degrade two
reactive dyes (Color Index Reactive Orange 4 and 13) in the presence of chloride ions, usually used as
dyeing electrolyte. For the two dyes, the kinetic of degradation was studied and also kinetic constants
were modelled. The influence of several factors such as pH, conductivity, dye concentration and reactive
group structure were evaluated. The adjustment of the established models was also studied.Electrochemical techniques combined with UV irradiation for the treatment and reuse of textile dyeing wastewaterhttp://hdl.handle.net/2117/76991
Electrochemical techniques combined with UV irradiation for the treatment and reuse of textile dyeing wastewater
Gutiérrez Bouzán, María Carmen; Sala, Mireia; López Grimau, Víctor
2015-09-21T12:10:00ZGutiérrez Bouzán, María CarmenSala, MireiaLópez Grimau, VíctorMineralization of hetero bi-functional reactive dye in aqueous solution by Fenton and photo-Fenton reactionshttp://hdl.handle.net/2117/76839
Mineralization of hetero bi-functional reactive dye in aqueous solution by Fenton and photo-Fenton reactions
Torrades Carné, Francesc; García Hortal, José Antonio; García Montaño, Julia
This study focused on the advanced oxidation of the hetero bi-functional reactive dye Sumifix Supra Yellow 3RF (CI Reactive Yellow 145) using dark Fenton and photo-Fenton conditions in a lab-scale experiment. A 2(3) factorial design was used to evaluate the effects of the three key factors: temperature, Fe(II) and H2O2 concentrations, for a dye concentration of 250 mg L-1 with chemical oxygen demand (COD) of 172 mg L-1 O-2 at pH = 3. The response function was the COD reduction. This methodology lets us find the effects and interactions of the studied variables and their roles in the efficiency of the treatment process. In the optimization, the correlation coefficients for the model (R-2) were 0.948 and 0.965 for Fenton and photo-Fenton treatments, respectively. Under optimized reaction conditions: pH = 3, temperature = 298 K, [H2O2] = 11.765 mM and [Fe(II)] = 1.075 mM; 60 min of treatment resulted in a 79% and 92.2% decrease in COD, for the dye taken as the model organic compound, after Fenton and photo-Fenton treatments, respectively
2015-09-16T08:51:19ZTorrades Carné, FrancescGarcía Hortal, José AntonioGarcía Montaño, JuliaThis study focused on the advanced oxidation of the hetero bi-functional reactive dye Sumifix Supra Yellow 3RF (CI Reactive Yellow 145) using dark Fenton and photo-Fenton conditions in a lab-scale experiment. A 2(3) factorial design was used to evaluate the effects of the three key factors: temperature, Fe(II) and H2O2 concentrations, for a dye concentration of 250 mg L-1 with chemical oxygen demand (COD) of 172 mg L-1 O-2 at pH = 3. The response function was the COD reduction. This methodology lets us find the effects and interactions of the studied variables and their roles in the efficiency of the treatment process. In the optimization, the correlation coefficients for the model (R-2) were 0.948 and 0.965 for Fenton and photo-Fenton treatments, respectively. Under optimized reaction conditions: pH = 3, temperature = 298 K, [H2O2] = 11.765 mM and [Fe(II)] = 1.075 mM; 60 min of treatment resulted in a 79% and 92.2% decrease in COD, for the dye taken as the model organic compound, after Fenton and photo-Fenton treatments, respectivelyPhotocatalytic membrane reactor for the removal of C.I. Disperse Red 73http://hdl.handle.net/2117/76768
Photocatalytic membrane reactor for the removal of C.I. Disperse Red 73
Buscio Olivera, Valentina; Brosillon, Stephan; Mendret, Julie; Crespi Rosell, Martin; Gutiérrez Bouzán, María Carmen
After the dyeing process, part of the dyes used to color textile materials are not fixed into the substrate and are discharged into wastewater as residual dyes. In this study, a heterogeneous photocatalytic process combined with microfiltration has been investigated for the removal of C.I. Disperse Red 73 from synthetic textile effluents. The titanium dioxide (TiO2) Aeroxide P25 was selected as photocatalyst. The photocatalytic treatment achieved between 60% and 90% of dye degradation and up to 98% chemical oxygen demand (COD) removal. The influence of different parameters on photocatalytic degradation was studied: pH, initial photocatalyst loading, and dye concentration. The best conditions for dye degradation were pH 4, an initial dye concentration of 50 mg<bold>L</bold>-1, and a TiO2 loading of 2 gL(-1). The photocatalytic membrane treatment provided a high quality permeate, which can be reused
2015-09-14T11:14:11ZBuscio Olivera, ValentinaBrosillon, StephanMendret, JulieCrespi Rosell, MartinGutiérrez Bouzán, María CarmenAfter the dyeing process, part of the dyes used to color textile materials are not fixed into the substrate and are discharged into wastewater as residual dyes. In this study, a heterogeneous photocatalytic process combined with microfiltration has been investigated for the removal of C.I. Disperse Red 73 from synthetic textile effluents. The titanium dioxide (TiO2) Aeroxide P25 was selected as photocatalyst. The photocatalytic treatment achieved between 60% and 90% of dye degradation and up to 98% chemical oxygen demand (COD) removal. The influence of different parameters on photocatalytic degradation was studied: pH, initial photocatalyst loading, and dye concentration. The best conditions for dye degradation were pH 4, an initial dye concentration of 50 mg<bold>L</bold>-1, and a TiO2 loading of 2 gL(-1). The photocatalytic membrane treatment provided a high quality permeate, which can be reused